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    • 82. 发明公开
    • 다중 캐리어 무선 통신 시스템에서의 송수신 방법 및 장치
    • 多载波无线通信系统中传输和接收的方法与装置
    • KR1020110134305A
    • 2011-12-14
    • KR1020110054501
    • 2011-06-07
    • 한국전자통신연구원
    • 고영조서방원안재영
    • H04J11/00H04B7/26H04W88/02H04W88/08
    • H04W72/042H04L1/0045H04L1/0061H04L5/001H04L5/0053H04W4/00H04W72/046H04W88/02H04W88/08H04J11/0069
    • PURPOSE: A communication method in a multi-carrier wireless communication system and an apparatus thereof are provided to only interpret a PDCCH(Physical Downlink Control CHannel) originated from a common search space as transmission, thereby solving ambiguity in DCI(Downlink Control Information) detection. CONSTITUTION: A terminal(400) monitors a PDCCH(Physical Downlink Control CHannel) search space(420). A PDCCH transmits uplink grant information and downlink allocation information which is DCI(Downlink Control Information). The terminal is comprised in order to monitor CRC(Cyclic Redundancy Check) scrambled PDCCH candidates by a C-RNTI(Cell-Radio Network Temporary Identifier) and etc. within user equipment specific search space and CSS(Common Search Space). A base station(410) transmits a physical downlink common channel to the terminal through a plurality of downlink component carriers(430). The terminal transmits a physical uplink common channel to the terminal through a plurality of uplink component carriers(440).
    • 目的:提供一种多载波无线通信系统及其装置中的通信方法,仅将从公共搜索空间发起的PDCCH(Physical Downlink Control Channel,物理下行链路控制信道)解码为传输,从而解决DCI(下行链路控制信息)检测中的歧义 。 构成:终端(400)监视PDCCH(物理下行链路控制信道)搜索空间(420)。 PDCCH发送作为DCI(下行链路控制信息)的上行链路许可信息和下行链路分配信息。 包括终端,以便通过用户设备专用搜索空间和CSS(公共搜索空间)内的C-RNTI(小区无线网络临时标识符)监视CRC(循环冗余校验)加扰PDCCH候选。 基站(410)通过多个下行链路分量载波(430)向终端发送物理下行链路公共信道。 终端通过多个上行链路分量载波(440)向终端发送物理上行链路公共信道。
    • 87. 发明公开
    • 페이크 MBSFN 서브 프레임의 DM-RS 전송 방법
    • 传播多媒体广播解调参考信号的方法单频网络子帧
    • KR1020110033064A
    • 2011-03-30
    • KR1020100092042
    • 2010-09-17
    • 한국전자통신연구원
    • 서방원
    • H04B7/26H04W4/06H04L27/26
    • H04L5/0048H04L5/026H04W4/06
    • PURPOSE: A DM-RS transmission method of a fake MBSFN sub frame is provided to improve a performance of channel estimation by arranging a DM-RS pattern on a time shaft which is maximally dispersed. CONSTITUTION: A DM-RS(Demodulation Reference Signal) pattern is arranged from a third symbol section of a sub frame. If it is a MBSFN(Multimedia Broadcasting Single Frequency Network) sub frame, a resource of a control channel is allocated until a second symbol section. If a control channel is until a second symbol section, a PDCCH(Physical Downlink Control Channel) is used only in a uplink resource grant. A DM0RS pattern for a fake MBSFN sub frame is arranged in a second symbol section. A DM-RS of a first antenna and a DM-RS of a second antenna is arranged in the same RE(Resource Element)s by a CDM(Code-Division Multiplexing) method.
    • 目的:提供一种伪MBSFN子帧的DM-RS传输方法,通过在最大分散的时间轴上布置DM-RS模式来提高信道估计的性能。 构成:从子帧的第三符号部分排列DM-RS(解调参考信号)模式。 如果是MBSFN(Multimedia Broadcasting Single Frequency Network,多媒体广播单频网络)子帧,则控制信道的资源被分配直到第二符号部分。 如果控制信道直到第二符号部分,则仅在上行链路资源准许中使用PDCCH(物理下行链路控制信道)。 用于伪MBSFN子帧的DM0RS模式被布置在第二符号部分中。 通过CDM(码分复用)方法将第一天线的DM-RS和第二天线的DM-RS布置在相同的RE(资源元素)中。
    • 88. 发明公开
    • 상향링크 복조용 레퍼런스 신호 전송 방법
    • 发送上行解调参考信号的方法
    • KR1020100137391A
    • 2010-12-30
    • KR1020100059044
    • 2010-06-22
    • 한국전자통신연구원
    • 서방원
    • H04L27/26H04B7/06
    • H04B7/26H04L27/2646
    • PURPOSE: In the reference signal transmission method for the uplink demodulation is the inside a slot, the uplink demodulation performance is kept in LTE-advanced by using two or more DFT-s-OFDM symbols. CONSTITUTION: In the first slot, the sequence element C1, 0 or the C30 which is similar about the subcarrier 0, 1 becomes in case of the transmission antenna 1 and 3 with the use(301). The sequence element C1, 1 or the C3, 1 which is similar about the subcarrier 2,3 becomes with the use(302). In case of the transmission antenna 2 and 4, the sequence element C20 or C4, 0 becomes about the subcarrier 0 with the use(303).
    • 目的:在上行解调的参考信号传输方式是一个时隙内,通过使用两个或多个DFT-s-OFDM符号将上行解调性能保持在LTE高级。 构成:在第一时隙中,在使用(301)发送天线1和3的情况下,与副载波0,1相似的序列元素C1,0或C30变为1。 使用(302),与子载波2,3相似的序列元素C1,1或C3,1变为。 在发送天线2和4的情况下,使用(303),序列元素C20或C4,0成为副载波0。
    • 90. 发明公开
    • 다중 사용자 다중 입력 다중 출력 기법을 이용하는 통신 시스템
    • MU-MIMO方案的通信系统
    • KR1020100068191A
    • 2010-06-22
    • KR1020090116554
    • 2009-11-30
    • 한국전자통신연구원
    • 서방원고영조안재영
    • H04B7/04H04W88/02
    • H04B7/0421H04B7/0452H04B7/0456H04B7/0632H04B7/0634H04B7/0639H04L25/0224H04W88/02
    • PURPOSE: A communication system for using multiuser MIMO technique is provided to efficiently transmit data of each user to several users at the same time by using the same time or the same frequency resource. CONSTITUTION: A channel estimator unit(420) estimates channel state with a base station. A precoding vector selector unit(430) selects the precoding vector among row vectors included in precoding matrix based on the channel state. In case consecutive row vectors are selected as the precoding vector, a feedback information generator unit(450) selects the column vector of outermost as the reference vector and generates the information about the number of the reference vector and selects column vectors as the feedback information. A transmit unit(460) transmits the feedback information to the base station.
    • 目的:提供一种使用多用户MIMO技术的通信系统,通过使用相同的时间或相同的频率资源,同时有效地向多个用户发送每个用户的数据。 构成:信道估计器单元(420)估计与基站的信道状态。 预编码向量选择器单元(430)基于信道状态来选择包含在预编码矩阵中的行向量之中的预编码向量。 在选择连续的行向量作为预编码向量的情况下,反馈信息生成单元(450)选择最外侧的列向量作为基准向量,并生成关于参照矢量的数量的信息,并选择列向量作为反馈信息。 发送单元(460)将反馈信息发送到基站。